Refactor media info handling into a controller.

src/card.ts

@@ -95,6 +95,7 @@ import {
 import { Timer } from './utils/timer';
 import { getParseErrorPaths } from './utils/zod.js';
 import { View } from './view/view.js';
+import { MediaLoadedInfoController } from './utils/media-info-controller';
 
 /** A note on media callbacks:
  *
@@ -187,6 +188,7 @@ class FrigateCard extends LitElement {
   protected _conditionController?: ConditionController;
   protected _automationsController?: AutomationsController;
   protected _menuButtonController = new MenuButtonController();
+  protected _mediaLoadedInfoController = new MediaLoadedInfoController();
 
   protected _refMenu: Ref<FrigateCardMenu> = createRef();
   protected _refMain: Ref<HTMLElement> = createRef();
@@ -197,10 +199,6 @@ class FrigateCard extends LitElement {
   protected _updateTimer = new Timer();
   protected _untriggerTimer = new Timer();
 
-  // Information about loaded media items.
-  protected _currentMediaLoadedInfo: MediaLoadedInfo | null = null;
-  protected _lastValidMediaLoadedInfo: MediaLoadedInfo | null = null;
-
   // Error/info message to render.
   protected _message: Message | null = null;
 
@@ -341,7 +339,6 @@ class FrigateCard extends LitElement {
     return this._cameraManager.getStore().getCameraConfig(this._view.camera);
   }
 
-
   /**
    * Set the card configuration.
    * @param inputConfig The card configuration.
@@ -414,7 +411,7 @@ class FrigateCard extends LitElement {
         this._conditionController?.hasHAStateConditions && {
           state: this._hass.states,
         }),
-      media_loaded: !!this._currentMediaLoadedInfo,
+      media_loaded: this._mediaLoadedInfoController.has(),
     });
   }
 
@@ -446,7 +443,7 @@ class FrigateCard extends LitElement {
     log(this._cardWideConfig, `Frigate Card view change: `, args?.view ?? '[default]');
     const changeView = (view: View): void => {
       if (View.isMajorMediaChange(this._view, view)) {
-        this._currentMediaLoadedInfo = null;
+        this._mediaLoadedInfoController.clear();
       }
       if (this._view?.view !== view.view) {
         this._resetMainScroll();
@@ -1151,16 +1148,16 @@ class FrigateCard extends LitElement {
         }
         break;
       case 'mute':
-        this._currentMediaLoadedInfo?.player?.mute();
+        this._mediaLoadedInfoController.get()?.player?.mute();
         break;
       case 'unmute':
-        this._currentMediaLoadedInfo?.player?.unmute();
+        this._mediaLoadedInfoController.get()?.player?.unmute();
         break;
       case 'play':
-        this._currentMediaLoadedInfo?.player?.play();
+        this._mediaLoadedInfoController.get()?.player?.play();
         break;
       case 'pause':
-        this._currentMediaLoadedInfo?.player?.pause();
+        this._mediaLoadedInfoController.get()?.player?.pause();
         break;
       default:
         console.warn(`Frigate card received unknown card action: ${action}`);
@@ -1371,7 +1368,7 @@ class FrigateCard extends LitElement {
           this._view,
           this._expand,
           {
-            currentMediaLoadedInfo: this._currentMediaLoadedInfo,
+            currentMediaLoadedInfo: this._mediaLoadedInfoController.get(),
             mediaPlayers: this._mediaPlayers,
             cameraURL: this._getCameraURLFromContext(),
             microphoneController: this._microphoneController,
@@ -1438,12 +1435,12 @@ class FrigateCard extends LitElement {
 
     log(this._cardWideConfig, `Frigate Card media load: `, mediaLoadedInfo);
 
-    this._lastValidMediaLoadedInfo = this._currentMediaLoadedInfo = mediaLoadedInfo;
+    this._mediaLoadedInfoController.set(mediaLoadedInfo);
 
     this._setPropertiesForExpandedMode();
 
     this._conditionController?.setState({
-      media_loaded: !!this._currentMediaLoadedInfo,
+      media_loaded: this._mediaLoadedInfoController.has(),
     });
 
     this.requestUpdate();
@@ -1453,10 +1450,11 @@ class FrigateCard extends LitElement {
     // When a new media loads, set the aspect ratio for when the card is
     // expanded/popped-up. This is based exclusively on last media content,
     // as dimension configuration does not apply in fullscreen or expanded mode.
+    const lastKnown = this._mediaLoadedInfoController.getLastKnown();
     this.style.setProperty(
       '--frigate-card-expand-aspect-ratio',
-      this._view?.isAnyMediaView() && this._lastValidMediaLoadedInfo
+      this._view?.isAnyMediaView() && lastKnown
-        ? `${this._lastValidMediaLoadedInfo.width} / ${this._lastValidMediaLoadedInfo.height}`
+        ? `${lastKnown.width} / ${lastKnown.height}`
         : 'unset',
     );
     // Non-media mays have no intrinsic dimensions and so we need to explicit
@@ -1475,7 +1473,7 @@ class FrigateCard extends LitElement {
    * Unload a media item.
    */
   protected _mediaUnloadedHandler(): void {
-    this._currentMediaLoadedInfo = null;
+    this._mediaLoadedInfoController.clear();
     this._conditionController?.setState({ media_loaded: false });
   }
 
@@ -1542,8 +1540,9 @@ class FrigateCard extends LitElement {
 
     const aspectRatioMode = this._getConfig().dimensions.aspect_ratio_mode;
 
-    if (this._lastValidMediaLoadedInfo && aspectRatioMode === 'dynamic') {
+    const lastKnown = this._mediaLoadedInfoController.getLastKnown();
-      return `${this._lastValidMediaLoadedInfo.width} / ${this._lastValidMediaLoadedInfo.height}`;
+    if (lastKnown && aspectRatioMode === 'dynamic') {
+      return `${lastKnown.width} / ${lastKnown.height}`;
     }
 
     const defaultAspectRatio = this._getConfig().dimensions.aspect_ratio;
@@ -1756,8 +1755,9 @@ class FrigateCard extends LitElement {
    * @returns The Lovelace card size in units of 50px.
    */
   public getCardSize(): number {
-    if (this._lastValidMediaLoadedInfo) {
+    const lastKnown = this._mediaLoadedInfoController.getLastKnown();
-      return this._lastValidMediaLoadedInfo.height / 50;
+    if (lastKnown) {
+      return lastKnown.height / 50;
     }
     return 6;
   }

src/utils/media-info-controller.ts

@@ -0,0 +1,27 @@
+import { MediaLoadedInfo } from '../types';
+
+export class MediaLoadedInfoController {
+  protected _current: MediaLoadedInfo | null = null;
+  protected _lastKnown: MediaLoadedInfo | null = null;
+
+  public set(current: MediaLoadedInfo): void {
+    this._current = current;
+    this._lastKnown = current;
+  }
+
+  public get(): MediaLoadedInfo | null {
+    return this._current;
+  }
+
+  public getLastKnown(): MediaLoadedInfo | null {
+    return this._lastKnown;
+  }
+
+  public clear(): void {
+    this._current = null;
+  }
+
+  public has(): boolean {
+    return !!this._current;
+  }
+}

src/utils/media-info.ts

@@ -69,18 +69,6 @@ export function dispatchMediaLoadedEvent(
   }
 }
 
-export function dispatchMediaVolumeChangeEvent(target: HTMLElement): void {
-  dispatchFrigateCardEvent(target, 'media:volumechange');
-}
-
-export function dispatchMediaPlayEvent(target: HTMLElement): void {
-  dispatchFrigateCardEvent(target, 'media:play');
-}
-
-export function dispatchMediaPauseEvent(target: HTMLElement): void {
-  dispatchFrigateCardEvent(target, 'media:pause');
-}
-
 /**
  * Dispatch a pre-existing MediaLoadedInfo object as an event.
  * @param element The element to send the event.
@@ -93,6 +81,26 @@ export function dispatchExistingMediaLoadedInfoAsEvent(
   dispatchFrigateCardEvent<MediaLoadedInfo>(target, 'media:loaded', MediaLoadedInfo);
 }
 
+/**
+ * Dispatch a media unloaded event.
+ * @param element The element to send the event.
+ */
+export function dispatchMediaUnloadedEvent(element: HTMLElement): void {
+  dispatchFrigateCardEvent(element, 'media:unloaded');
+}
+
+export function dispatchMediaVolumeChangeEvent(target: HTMLElement): void {
+  dispatchFrigateCardEvent(target, 'media:volumechange');
+}
+
+export function dispatchMediaPlayEvent(target: HTMLElement): void {
+  dispatchFrigateCardEvent(target, 'media:play');
+}
+
+export function dispatchMediaPauseEvent(target: HTMLElement): void {
+  dispatchFrigateCardEvent(target, 'media:pause');
+}
+
 /**
  * Determine if a MediaLoadedInfo object is valid/acceptable.
  * @param info The MediaLoadedInfo object.
@@ -103,11 +111,3 @@ export function isValidMediaLoadedInfo(info: MediaLoadedInfo): boolean {
     info.height >= MEDIA_INFO_HEIGHT_CUTOFF && info.width >= MEDIA_INFO_WIDTH_CUTOFF
   );
 }
-
-/**
- * Dispatch a media unloaded event.
- * @param element The element to send the event.
- */
-export function dispatchMediaUnloadedEvent(element: HTMLElement): void {
-  dispatchFrigateCardEvent(element, 'media:unloaded');
-}

tests/utils/media-info-controller.test.ts

@@ -0,0 +1,26 @@
+import { beforeEach, describe, expect, it } from 'vitest';
+import { MediaLoadedInfoController } from '../../src/utils/media-info-controller';
+import { createMediaLoadedInfo } from '../test-utils.js';
+
+describe('MediaLoadedInfoController', () => {
+  let controller: MediaLoadedInfoController;
+  beforeEach(() => {
+    controller = new MediaLoadedInfoController();
+  })
+
+  it('should set', () => {
+    const info = createMediaLoadedInfo()
+    controller.set(info);
+    expect(controller.has());
+    expect(controller.get()).toBe(info)
+  });
+
+  it('should get last known', () => {
+    const info = createMediaLoadedInfo()
+    controller.set(info);
+    expect(controller.has()).toBeTruthy();
+    controller.clear();
+    expect(controller.has()).toBeFalsy();
+    expect(controller.getLastKnown()).toBe(info);
+  });
+});

tests/utils/media-info.test.ts

@@ -0,0 +1,202 @@
+import { describe, expect, it, vi } from 'vitest';
+import { mock } from 'vitest-mock-extended';
+import { FrigateCardMediaPlayer, MediaLoadedCapabilities } from '../../src/types';
+import {
+  createMediaLoadedInfo,
+  dispatchExistingMediaLoadedInfoAsEvent,
+  dispatchMediaLoadedEvent,
+  dispatchMediaPauseEvent,
+  dispatchMediaPlayEvent,
+  dispatchMediaUnloadedEvent,
+  dispatchMediaVolumeChangeEvent,
+  isValidMediaLoadedInfo,
+} from '../../src/utils/media-info';
+import { createMediaLoadedInfo as createTestMediaLoadedInfo } from '../test-utils.js';
+
+const options = {
+  player: mock<FrigateCardMediaPlayer>(),
+  capabilities: mock<MediaLoadedCapabilities>(),
+};
+
+// @vitest-environment jsdom
+describe('createMediaLoadedInfo', () => {
+  it('should create from image', () => {
+    const img = document.createElement('img');
+
+    // Need to write readonly properties.
+    Object.defineProperty(img, 'naturalWidth', { value: 10 });
+    Object.defineProperty(img, 'naturalHeight', { value: 20 });
+
+    expect(createMediaLoadedInfo(img, options)).toEqual({
+      width: 10,
+      height: 20,
+      ...options,
+    });
+  });
+
+  it('should create from video', () => {
+    const video = document.createElement('video');
+
+    // Need to write readonly properties.
+    Object.defineProperty(video, 'videoWidth', { value: 30 });
+    Object.defineProperty(video, 'videoHeight', { value: 40 });
+
+    expect(createMediaLoadedInfo(video, options)).toEqual({
+      width: 30,
+      height: 40,
+      ...options,
+    });
+  });
+
+  it('should create from canvas', () => {
+    const canvas = document.createElement('canvas');
+    canvas.width = 50;
+    canvas.height = 60;
+
+    expect(createMediaLoadedInfo(canvas, options)).toEqual({
+      width: 50,
+      height: 60,
+      ...options,
+    });
+  });
+
+  it('should not create from unknown', () => {
+    const div = document.createElement('div');
+    expect(createMediaLoadedInfo(div, options)).toBeNull();
+  });
+
+  it('should create from event', () => {
+    const img = document.createElement('img');
+
+    // Need to write readonly properties.
+    Object.defineProperty(img, 'naturalWidth', { value: 70 });
+    Object.defineProperty(img, 'naturalHeight', { value: 80 });
+
+    const event = new Event('foo');
+    Object.defineProperty(event, 'composedPath', { value: () => [img] });
+
+    expect(createMediaLoadedInfo(event, options)).toEqual({
+      width: 70,
+      height: 80,
+      ...options,
+    });
+  });
+});
+
+// @vitest-environment jsdom
+describe('dispatchMediaLoadedEvent', () => {
+  const options = {
+    player: mock<FrigateCardMediaPlayer>(),
+    capabilities: mock<MediaLoadedCapabilities>(),
+  };
+
+  it('should dispatch', () => {
+    const handler = vi.fn();
+    const div = document.createElement('div');
+    div.addEventListener('frigate-card:media:loaded', handler);
+
+    // Need to write readonly properties.
+    const img = document.createElement('img');
+    Object.defineProperty(img, 'naturalWidth', { value: 10 });
+    Object.defineProperty(img, 'naturalHeight', { value: 20 });
+
+    dispatchMediaLoadedEvent(div, img, options);
+    expect(handler).toBeCalledWith(
+      expect.objectContaining({
+        detail: {
+          width: 10,
+          height: 20,
+          ...options,
+        },
+      }),
+    );
+  });
+
+  it('should not dispatch', () => {
+    const handler = vi.fn();
+    const div = document.createElement('div');
+    div.addEventListener('frigate-card:media:loaded', handler);
+
+    dispatchMediaLoadedEvent(div, div, options);
+    expect(handler).not.toBeCalled();
+  });
+});
+
+// @vitest-environment jsdom
+describe('dispatchExistingMediaLoadedInfoAsEvent', () => {
+  it('should dispatch', () => {
+    const handler = vi.fn();
+    const div = document.createElement('div');
+    div.addEventListener('frigate-card:media:loaded', handler);
+    const info = createTestMediaLoadedInfo();
+
+    dispatchExistingMediaLoadedInfoAsEvent(div, info);
+    expect(handler).toBeCalledWith(
+      expect.objectContaining({
+        detail: info,
+      }),
+    );
+  });
+});
+
+// @vitest-environment jsdom
+describe('dispatchMediaUnloadedEvent', () => {
+  it('should dispatch', () => {
+    const handler = vi.fn();
+    const div = document.createElement('div');
+    div.addEventListener('frigate-card:media:unloaded', handler);
+
+    dispatchMediaUnloadedEvent(div);
+    expect(handler).toBeCalled();
+  });
+});
+
+// @vitest-environment jsdom
+describe('dispatchMediaVolumeChangeEvent', () => {
+  it('should dispatch', () => {
+    const handler = vi.fn();
+    const div = document.createElement('div');
+    div.addEventListener('frigate-card:media:volumechange', handler);
+
+    dispatchMediaVolumeChangeEvent(div);
+    expect(handler).toBeCalled();
+  });
+});
+
+// @vitest-environment jsdom
+describe('dispatchMediaPlayEvent', () => {
+  it('should dispatch', () => {
+    const handler = vi.fn();
+    const div = document.createElement('div');
+    div.addEventListener('frigate-card:media:play', handler);
+
+    dispatchMediaPlayEvent(div);
+    expect(handler).toBeCalled();
+  });
+});
+
+// @vitest-environment jsdom
+describe('dispatchMediaPauseEvent', () => {
+  it('should dispatch', () => {
+    const handler = vi.fn();
+    const div = document.createElement('div');
+    div.addEventListener('frigate-card:media:pause', handler);
+
+    dispatchMediaPauseEvent(div);
+    expect(handler).toBeCalled();
+  });
+});
+
+// @vitest-environment jsdom
+describe('isValidMediaLoadedInfo', () => {
+  it('should be valid with correct dimensions', () => {
+    expect(
+      isValidMediaLoadedInfo(createTestMediaLoadedInfo({ width: 100, height: 100 })),
+    ).toBeTruthy();
+  });
+  it('should be invalid with unlikely dimensions', () => {
+    expect(
+      isValidMediaLoadedInfo(createTestMediaLoadedInfo({ width: 0, height: 0 })),
+    ).toBeFalsy();
+  });
+});